Search Results for "JVET-M0447"
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JVET-M0447 CE9: Constrained intra prediction with DMVR (test 9.2.4) [M. Xu, X. Li, S. Liu (Tencent)]
This contribution presents DMVR simplifications based on VTM3.0. Firstly, only 4 integer precision surround check for certain condition, followed by MRSAD mean value calculation by sampling process, then use SAD calculation to replace MRSAD. The proposed technologies have 0.71%/ 0.68%, 0.60% gain respectively compared to VTM3.0 anchor.
JVET-M1033 Description of Core Experiment 13 (CE13): Neural-network based loop filtering [Y. Li, S. Liu, K. Kawamura]
Future meeting plans, expressions of thanks, and closing of the meeting
Future meeting plans were established according to the following guidelines:
- Meeting under ITU-T SG 16 auspices when it meets (starting meetings on the Tuesday of the first week and closing it on the Wednesday of the second week of the SG 16 meeting – a total of 9 meeting days), and
- Otherwise meeting under ISO/IEC JTC 1/SC 29/WG 11 auspices when it meets (starting meetings on the Wednesday prior to such meetings and closing it at lunchtime on the last day of the WG 11 meeting – a total of 9.5 meeting days).
In cases where an exceptionally high workload is expected for a meeting, an earlier starting date may be defined.
Some specific future meeting plans (to be confirmed) were established as follows:
- Tue. 19 – Wed. 27 March 2019, 14th meeting under ITU-T auspices in Geneva, CH.
- Wed. 3 – Fri. 12 July 2019, 15th meeting under WG 11 auspices in Gothenburg, SE.
- Tue. 1 – Wed. 9 October 2019, 16th meeting under ITU-T auspices in Geneva, CH.
- Wed. 8 – Fri. 17 January 2020, 17th meeting under WG 11 auspices in Brussels, BE.
The agreed document deadline for the 14th JVET meeting was planned to be Tuesday 12 March 2019. Plans for scheduling of agenda items within that meeting remained TBA.
WG 11, the local hosting organization Ecole Mohammadia d’Ingénieurs (EMI) – Mohammed V University, Rabat, Morocco, and Abdellatif Benjelloun Touimi were thanked for the excellent hosting and organization of the 13th ...
JVET-M0029 CE9: Summary report on decoder side motion vector derivation [X. Xiu, S. Esenlik]
The core experiment summary report is organized into 2 sub-tests as follows:
- CE9.1: BDOF design (3 tests)
- CE9.2: DMVR design (24 tests)
CE9.1: BDOF design
# | Description | Tester | Cross-checker |
9.1.1.a | 1. use 8-tap DCTIF filters to generate the prediction samples in extended region and inside CU 2. padding for reference samples outside [w+7, h+7] for final MC (DCTIF) | Xiu, Xiaoyu | H. Liu |
9.1.1.b | 1. use integer positions to generate the prediction samples in extended region 2. use 8-tap DCTIF filters to generate the prediction samples inside CU | Xiu, Xiaoyu | H. Liu |
9.1.1.c | 1. apply different gradient calculation method for prediction samples on the CU boundaries and inside CU 2. use 8-tap DCTIF filters to generate the prediction samples inside CU | Xiu, Xiaoyu | H. Liu |
VTM | Cross-Check | ||||||||
Test | Document | Crosschecker | Y | U | V | EncT | DecT | EncT | DecT |
9.1.1 a | JVET-M0487 | H. Liu | -0.01% | 0.03% | 0.02% | 103% | 102% | 105% | 104% |
9.1.1 b | H. Liu | 0.05% | 0.02% | 0.02% | 99% | 98% | 99% | 100% | |
9.1.1 c | H. Liu | 0.10% | 0.03% | 0.01% | 99% | 98% | 100% | 100% | |
9.1.1.a does not simplify, replaces bilinear filters in extended region by DCTIF
9.1.1.b simplifies by using no interpolation in extended region (just integer positions)
9.1.1.c changes the gradient calculation at boundaries and does not need extended region any more, it simplifies, but the design becomes less unified
Several experts supported 9.1.1.b as the best simplified design approach.
Decision: Adopt JVET-M0487 (solution 9.1.1.b) which uses integer positions to generate the prediction samples in extended region, and uses 8-tap DCTIF filters to...